Must be something going around, my server died for a few minutes early yesterday morning, then my slew of debug emails appeared, all 48,000 of them. I'm guessing the web-spider was crawling at the same time...

I know why it happened, but need to figure out a way to stop it in future.
Someone visited Foldapuz, and flicked through about 100 iterations of puzzle sheets. Over and over and over again, it had to generate images, and each time it does so, the system leaks a little bit of memory.
The PHP continued but the SQL could not longer fit!!

Caching of each puzzle, done already.
But then it loads them orientates them for the requested sheet, pastes them together and outputs the result.
It does also cache those, but not everything..
There are 82 puzzle types, and 8 slots, meaning .. um...